With the aim of assessing "the iodine status of Polish boys with severe autism compared to their healthy peers" (authors words not mine), researchers reported results for various iodine and related measures (including metabolites related to thyroid function). They concluded that: "Thyroid hormones were within normal reference ranges in both groups while urinary iodine was significantly lower in autistic boys suggesting that further studies into the nonhormonal role of iodine in autism are required."

Insofar as the 'nonhormonal' uses of iodine and what deficiency in [some] autism might mean, I'd be minded to point other areas of interest outside of just cognitive effects [4]. The intersection between iodine, selenium and iron is worthwhile mentioning in light of the various co-dependencies of these nutrients in maintaining health and wellbeing. Other research has noted deficiencies in these three nutrients as part of a pattern in some autism [5]. Together with a suite of peer-reviewed literature suggesting that there maybe much more to see when it comes to micronutrient levels in at least some cases of autism, the onus once again is on screening followed by evidence-guided decisions on possible intervention(s).

ABOUT AUTISM SPECTRUM CONDITIONS

Autism or autism spectrum conditions describe several presentations characterised by core issues with social affect and stereotyped or repetitive actions. Diagnosis is made by observation and analysis of developmental history. These are heterogeneous conditions which can carry various co-morbidities and whilst described as life-long are affected by age and maturation. Autism means different things to different people. To some it means a need for life-long support. To others it is part of the varied tapestry of humanity. To all it means a need to foster a welcoming society with appropriate support and opportunities.